Thrust Bearings

[whoopass_racer]

Note to mod: not put in serpent area as i might get better help in this area as its a general question.


Just been running my S 710 at TRCC and the thrust bearing in the clutch disintergrated after i rolled the car at the end of the straight.
Luckily I have a spare but I was wondering what could of caused it?

Any advice/tips on why this happened, or how to stop it?

Thanks all.

Mike Pemberton

[Mark Christopher]

its a general question so it would stay here


the normal failure of the clutch thrust bearing is too much end float!

use a god grease such as Mugen cvd grease, (good anti fling)
and always keep it lubed

have you set your end float?
on a Mugen it should be around .3mm so i would say its about the same

what causes failure is when the clutch takes up drive too much end float and the clutch bangs hard into the bearing. the best way is to measure with digital verniers!
try calling elite rc for a setting!

[Yokman]

I've had this problem in the past with my old Serpent Impact. If you have a careful look at the instructions for the assembly of the Centax clutch you'll see that the thrust bearing washers have very slightly different sized holes. If I remember correctly the bigger hole is on the inside washer and I think one of the washers has a mark on it but check the instructions. Assemble these with the holes the wrong way round and the thrust race eventually disintegrates. Hope this helps.

[mark lang]

Yokman is right, one of the thrust washers is 5.0mm the other is 5.2mm which are the internal dimensions, when assembling the thrust bearing onto the carrier the smaller diameter washer goes on first, this should be shimmed between the carrier shoulder and thrust bearing to achieve 0.7mm clutch gap, the bigger diameter washer is the one that enters the clutch bell first. With your clutch gap set you then need to shim between the tensioning spring and bearing to reduce your end float, I shim mine so that there is barely any end float noticeable. Grease wise I use a silicon grease that I have used for 10 months without any problems.

Hope that helps

Mark

[Yokman]

Try this link for a step by step guide to assembling and adjusting the centax clutch.

http://www.mytsn.com/publ/publ.asp?sn=2&pid=6910&exp=0